CN109141719B - Device and method for measuring preload of automobile power assembly suspension system - Google Patents
Device and method for measuring preload of automobile power assembly suspension system Download PDFInfo
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- CN109141719B CN109141719B CN201811048020.0A CN201811048020A CN109141719B CN 109141719 B CN109141719 B CN 109141719B CN 201811048020 A CN201811048020 A CN 201811048020A CN 109141719 B CN109141719 B CN 109141719B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Abstract
The invention discloses a device for measuring the preload of an automobile power assembly suspension system and a measuring method thereof.A support frame comprises a support cross rod and support vertical rods which are respectively arranged at the two ends of the support cross rod, the support cross rod and the support vertical rods enclose an inverted U-shaped frame, a preload measuring mechanism is arranged on the support cross rod in a sliding manner through a transverse moving mechanism, a longitudinal moving mechanism is arranged between the support cross rod and the support vertical rods, the support vertical rods are fixed on the ground through support parts, and an automobile body pressing mechanism is arranged on the support parts; the device has the advantages that the vehicle body pressing mechanism always firmly presses the vehicle body in the measuring process, so that the vehicle body rebounds when the engine side suspension/gearbox side suspension is disassembled, the position and the load of the vehicle body before and after the suspension is disassembled are unchanged, and the measuring accuracy is ensured; the position of the preloading measuring mechanism is adjusted through the transverse moving mechanism and the longitudinal moving mechanism, so that the position of the preloading measuring mechanism can be adjusted front, back, left and right, the use is more flexible, and the measuring accuracy is ensured.
Description
Technical Field
The invention relates to a measuring device and a measuring method thereof, in particular to a device for measuring the preload of an automobile power assembly suspension system and a measuring method thereof.
Background
Automobile power assembly passes through rubber suspension and body coupling, and suspension system main function has: the supporting function ensures that the automobile power assembly is in a reasonable position; limiting, namely limiting the maximum displacement of the power assembly under various transient working conditions of the automobile; the vibration isolation function prevents the power assembly from transmitting force to the vehicle body on one hand, and prevents vibration and impact of uneven road excitation on the power assembly on the other hand.
The stiffness and length of the linear section of the suspension have an important influence on the vibration isolation capability of the suspension system. The pendulum type three-point suspension system of the automobile comprises an engine suspension, a gearbox suspension and a rear suspension, wherein the engine suspension and the gearbox suspension are rubber suspensions, and the rear suspension is a pull rod. The engine suspension and the gearbox suspension respectively comprise a shell, a suspension support arm and a rubber main spring.
In a static state, the power assembly is mainly supported by an engine suspension and a gearbox suspension, the rear pull rod is hardly stressed in the Z direction, and the engine suspension and the gearbox suspension are also called the power assembly suspension in a general way. The method has the advantages that the preload of the powertrain suspension in the Z direction is obtained, the design of the rigidity and the length of the linear section of the powertrain suspension has a reference function, and the preload of the powertrain suspension in the Z direction can be calculated under the static state of the automobile. In addition, the performance of the power assembly suspension is respectively related to the preload suffered by the power assembly suspension, so that the acquisition of the preload suffered by the engine suspension and the gearbox suspension in the Z direction provides input for the performance test of the power assembly suspension in the X/Y/Z directions. At present, the preload of a power assembly suspension system can only be obtained through software simulation, and after actual loading, the situation that the theoretical preload and the actual preload are inconsistent occurs in the running process, even the difference is very large, so that the engine suspension and/or the gearbox suspension are/is failed, and the preload of the engine suspension and/or the gearbox suspension in the Z direction needs to be obtained again in the later period so as to be used for re-development and design.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device for measuring the preload of an automobile power assembly suspension system and a measuring method thereof, which have high accuracy and simple operation.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a measure preloaded device of automobile power assembly suspension system, includes support frame, lateral shifting mechanism, longitudinal movement mechanism, preload measuring mechanism and automobile body hold-down mechanism, the support frame including support the horizontal pole and set up respectively the support montant at support horizontal pole both ends, the support horizontal pole with the support montant enclose into the U type frame of an inversion, preload measuring mechanism pass through lateral shifting mechanism slide and set up the support horizontal pole on, the support horizontal pole with the support montant between be provided with longitudinal movement mechanism, the support montant pass through the supporting part and fix subaerial, the supporting part on be provided with automobile body hold-down mechanism.
The supporting part be the triangle supporting part, the triangle supporting part include that bracing piece and symmetry set up the down tube of bracing piece both sides, the bracing piece the top of down tube respectively with the bottom fixed connection who supports the montant, the bracing piece the bottom of down tube be provided with corresponding installation chassis respectively, installation chassis pass through rag bolt and fix subaerial, the central line of bracing piece with the central line that supports the montant on same straight line. Because the triangular supporting part comprises the supporting rod and the inclined rods symmetrically arranged on two sides of the supporting rod, and the bottom of the supporting rod and the bottom of the inclined rods are provided with the installation chassis, the triangular stability can be utilized, and the installation chassis is arranged at the bottom of the supporting rod and the bottom of the inclined rods, so that the stability of the supporting vertical rod is ensured, and the stability of measurement is ensured.
The automobile body hold-down mechanism include installation pole, depression bar subassembly and locking Assembly, the bottom of installation pole fix the installation chassis of bracing piece on, the depression bar subassembly include depression bar and sleeve, the one end of depression bar fix the sleeve on, the sleeve cover establish the installation pole on, locking Assembly include last lock nut and lower lock nut, the installation pole on be provided with the external screw thread, last lock nut with lower lock nut in be provided with respectively with external screw thread assorted internal thread, the sleeve be located go up lock nut with lower lock nut between, the sleeve pass through go up lock nut with lower lock nut screw up fix on the installation pole. The depression bar is used for compressing tightly the automobile body, fixes the depression bar on the sleeve, adjusts the position of depression bar through last lock nut and lock nut down, and the screw thread is adjusted and is realized, has the convenient advantage of regulation.
The pressing rod comprises a front pressing rod and a rear pressing rod, the rear end of the front pressing rod is rotatably connected to the front end of the rear pressing rod through a rotating shaft, and the rear end of the rear pressing rod is fixed on the sleeve. The compression bar comprises a front compression bar and a rear compression bar, the length of the compression bar can be changed to be suitable for automobiles with different widths, and the compression bar has the advantage of wide application range.
The longitudinal movement mechanism comprises a longitudinal guide rail, a longitudinal rolling member and a longitudinal rolling member mounting seat, the lower bottom surface of the longitudinal guide rail is fixedly connected with the top end of the supporting vertical rod, the longitudinal guide rail is vertically connected with the supporting vertical rod, the outer side wall of the longitudinal rolling member mounting seat is fixedly connected with the end part of the supporting transverse rod, the lower end of the longitudinal rolling member mounting seat is provided with an inward concave groove, the longitudinal rolling member is connected with the longitudinal rolling member in the groove in a rotating mode, and the longitudinal rolling member is connected with the longitudinal guide rail in a sliding mode.
And two end parts of the longitudinal guide rail are respectively provided with a limiting shaft, and the length of the limiting shaft is greater than the width of the longitudinal rolling member mounting seat. The length of the limiting shaft is larger than the width of the longitudinal rolling element mounting seat, the limiting shaft plays a limiting role on the longitudinal rolling element mounting seat, and the rolling assembly is prevented from being separated from the longitudinal guide rail.
The transverse moving mechanism comprises a transverse rolling part, a transverse mounting seat and a transverse guide groove arranged on the upper surface of the supporting cross rod, the transverse rolling part is rotatably connected in the transverse mounting seat, the transverse rolling part is in sliding connection with the transverse guide groove, and the transverse mounting seat is sleeved on the supporting cross rod.
The pre-load measuring mechanism comprises a chain block, an electronic scale and a bearing lantern ring, wherein the chain block comprises an upper hook, a lower hook and a chain, the upper hook is connected with the lower end part of the transverse mounting seat, the lower hook is connected with the upper end of the electronic scale, and the lower end of the electronic scale is connected with the bearing lantern ring.
A method for measuring the preload of a vehicle powertrain suspension system comprises the following steps based on the device for measuring the preload of the vehicle powertrain suspension system:
(1) removing an engine cover of the automobile to be preloaded, driving the automobile into the lower part of the supporting cross rod, and enabling a front shaft of the automobile to be parallel to the connecting line of the middle points of the two supporting vertical rods;
(2) respectively unscrewing an upper locking nut and a lower locking nut, moving the sleeve until the pressure rod presses the vehicle body at the first suspension to be measured and the second suspension to be measured, and then respectively screwing the upper locking nut and the lower locking nut to fix the sleeve;
(3) marking a point, defined as a, on the upper surface of the powertrain near the first suspension to be measured, a point, defined as B, on the transverse frame of the vehicle body near the first suspension to be measured, a point, defined as C, on the longitudinal frame of the vehicle body near the first suspension to be measured, measuring the distance from point a to point B with a tape measure and recording as L1, measuring the distance from point a to point C with a tape measure and recording as L2;
(4) supporting the bottom of the power assembly by using a hydraulic jack, removing a first suspension to be measured, taking a first suspension support arm to be measured of the same model, fixedly connecting one end of the first suspension support arm to be measured with the corresponding power assembly side, and drawing a straight line, marked as J1, on the upper surface of the first suspension support arm to be measured, at the intersection of the straight line and the plane where the elastic center of the main spring is located after the main spring is installed;
(5) moving the chain block to enable the electronic scale to be positioned right above the straight line J1, sleeving the bearing lantern ring into the first suspension support arm to be measured, and enabling the bearing lantern ring to be positioned in the vertical plane where the straight line J1 is positioned; pulling the chain of the chain block until the power assembly is not in contact with the hydraulic jack, and removing the hydraulic jack;
(6) adjusting a chain of a chain block to enable a power assembly to be in a horizontal state, measuring the distance from a point A to a point B by using a measuring tape, recording the distance as L1 ', measuring the distance from the point A to the point C as L2', L1 'subtracting L1 in the step (3) to obtain differences a1 and L2', subtracting L2 in the step (3) to obtain a difference a2, if | a1| and | a2| are respectively less than or equal to 5mm, recording the reading of the electronic scale at the moment, wherein the reading is the preload applied to a first to-be-measured suspension in the Z direction of the automobile in a static state, and if | a1| or | a2| is greater than 5mm, continuing to adjust the chain block to adjust the posture of the power assembly until | a1| and | a2| are respectively less than or equal to 5mm, and recording the reading at the moment;
(7) after the preload measurement of the first suspension to be measured is finished, measuring the preload of the second suspension to be measured, and resetting and installing the first suspension to be measured;
(8) marking a point on the upper surface of the powertrain proximate the second suspension to be measured, defined as D, a point on the vehicle body proximate the transverse frame of the second suspension to be measured, defined as E, a point on the vehicle body proximate the longitudinal frame of the second suspension to be measured, defined as F, measuring the distance from point D to point E with a tape measure and recorded as L3, measuring the distance from point D to point F with a tape measure and recorded as L4;
(9) removing the second suspension to be measured, taking a second suspension support arm to be measured with the same model, fixedly connecting one end of the second suspension support arm to be measured with the corresponding power assembly side, and drawing a straight line, marked as J2, on the upper surface of the second suspension support arm to be measured, at the intersection of the straight line and the plane where the elastic center of the main spring is located after the main spring is installed;
(10) moving the chain block to enable the electronic scale to be positioned right above the straight line J2, sleeving the bearing lantern ring into the second suspension arm to be measured, and enabling the bearing lantern ring to be positioned in the vertical plane where the straight line J2 is positioned; pulling the chain of the chain block until the power assembly is not in contact with the hydraulic jack, and removing the hydraulic jack;
(11) adjusting a chain of a chain block to enable a power assembly to be in a horizontal state, measuring the distance from a point D to a point E by a measuring tape, recording the distance as L ', measuring the distance from the point D to the point F, recording the distance as L ', subtracting L in the step (8) to obtain differences a3 and L ', subtracting L in the step (8) to obtain a difference a4, if | a3|, | a4| is respectively less than or equal to 5mm, recording the reading of the electronic scale at the moment, wherein the reading is the preload applied to the second to-be-measured suspension in the Z direction under the static state of the automobile, and if | a3| or | a 367 | is greater than 5mm, continuing to adjust the chain block to adjust the attitude of the power assembly until | a3|, | a4| is respectively less than or equal to 5mm, and recording the reading of the electronic scale at the moment.
The first suspension to be measured is an engine suspension or a gearbox suspension, and the second suspension to be measured is an engine suspension or a gearbox suspension.
Compared with the prior art, the invention has the advantages that the invention discloses a device for measuring the preload of the suspension system of the automobile power assembly, the vertical support rod is fixed on the ground through the support part by the device, and the automobile body pressing mechanism is arranged on the support part, so that the automobile body is always firmly pressed by the automobile body pressing mechanism in the measuring process, the phenomenon that the automobile body rebounds when the side suspension of an engine/a gearbox is disassembled is avoided, the position and the load of the automobile body before and after the suspension is disassembled are unchanged, and the posture of the power assembly relative to the automobile body is unchanged, so that the acting force of the power assembly on the engine suspension, the gearbox suspension and the rear suspension is kept unchanged, and the measuring accuracy is ensured; the preload measuring mechanism is arranged on the supporting cross rod in a sliding mode through the transverse moving mechanism, and the longitudinal moving mechanism is arranged between the supporting cross rod and the supporting vertical rod, so that the preload measuring mechanism is adjustable in front and back and left and right positions, the use is more flexible, and the measuring accuracy is guaranteed;
the method has the advantages of simple operation and high accuracy; the method is characterized in that the preload which is subjected to the engine suspension and the gearbox suspension in a static state is obtained, the preload has a reference meaning on the design of the rigidity and the length of a linear section of the suspension, and in addition, the preload input can be provided for the performance test of the suspension.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the present invention in cooperation with an engine;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a front view of the vehicle body hold down mechanism of the present invention;
FIG. 5 is a cross-sectional view of the vehicle body hold down mechanism of the present invention;
FIG. 6 is a schematic view of the compression bar assembly of the present invention;
FIG. 7 is a schematic illustration of the present invention first measuring engine mount preload;
FIG. 8 is a schematic illustration of the preload of the rear derailleur suspension of the present invention;
FIG. 9 is a schematic illustration of the present invention first measuring the preload of the transmission suspension;
FIG. 10 is a schematic illustration of a post-measurement engine mount preload of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows: as shown in fig. 1-2, a device for measuring preload of a suspension system of an automotive powertrain includes a support frame 100, a lateral moving mechanism 200, a longitudinal moving mechanism 300, a preload measuring mechanism 400, and a vehicle body pressing mechanism 500, where the support frame 100 includes a support cross bar 110 and support vertical bars 120 respectively disposed at two ends of the support cross bar 110, the support cross bar 110 and the support vertical bars 120 form an inverted U-shaped frame, the preload measuring mechanism 400 is slidably disposed on the support cross bar 110 through the lateral moving mechanism 200, the longitudinal moving mechanism 300 is disposed between the support cross bar 110 and the support vertical bars 120, the support vertical bars 120 are fixed on the ground through support portions 130, and the vehicle body pressing mechanism 500 is disposed on the support portions 130.
In this embodiment, the supporting portion 130 is a triangular supporting portion, the triangular supporting portion includes a supporting rod 131 and diagonal rods 132 symmetrically disposed on two sides of the supporting rod 131, top ends of the supporting rod 131 and the diagonal rods 132 are respectively and fixedly connected to a bottom end of the supporting vertical rod 120, bottom ends of the supporting rod 131 and the diagonal rods 132 are respectively provided with corresponding mounting chassis 140, the mounting chassis 140 is fixed on the ground through anchor bolts 141, and a center line of the supporting rod 131 and a center line of the supporting vertical rod 120 are on the same straight line.
In this embodiment, as shown in fig. 4-6, the vehicle body pressing mechanism 500 includes a mounting rod 510, a pressing rod assembly 520, and a locking assembly 530, a bottom of the mounting rod 510 is fixed on the mounting chassis 140 of the supporting rod 131, the pressing rod assembly 520 includes a pressing rod 521 and a sleeve 522, one end of the pressing rod 521 is fixed on the sleeve 522, the sleeve 522 is sleeved on the mounting rod 510, the locking assembly 530 includes an upper locking nut 531 and a lower locking nut 532, an external thread (not shown) is provided on the mounting rod 510, internal threads (not shown) matching with the external thread (not shown) are respectively provided in the upper locking nut 531 and the lower locking nut 532, the sleeve 522 is located between the upper locking nut 531 and the lower locking nut 532, and the sleeve 522 is screwed and fixed on the mounting rod 510 through the upper locking nut 531 and the lower locking nut 532.
In this embodiment, the pressing rod 521 includes a front pressing rod 5211 and a rear pressing rod 5212, the rear end of the front pressing rod 5211 is rotatably connected to the front end of the rear pressing rod 5212 through a rotating shaft 5213, and the rear end of the rear pressing rod 5212 is fixed on the sleeve 522.
In this embodiment, the longitudinal moving mechanism 300 includes a longitudinal guide rail 310, a longitudinal rolling member 320, and a longitudinal rolling member mounting seat 330, a lower bottom surface of the longitudinal guide rail 310 is fixedly connected to a top end of the vertical support rod 120, the longitudinal guide rail 310 is vertically connected to the vertical support rod 120, an outer side wall of the longitudinal rolling member mounting seat 330 is fixedly connected to an end of the horizontal support rod 110, a concave groove 331 is formed at a lower end of the longitudinal rolling member mounting seat 330, the longitudinal rolling member 320 is rotatably connected to the groove 331, and the longitudinal rolling member 320 is slidably connected to the longitudinal guide rail 310. The longitudinal rolling elements 320 may be rollers or rolling bearings.
In this embodiment, the two ends of the longitudinal rail 310 are respectively provided with a limiting shaft 340, and the length of the limiting shaft 340 is greater than the width of the longitudinal roller mounting seat 330.
In this embodiment, as shown in fig. 3, the lateral moving mechanism 200 includes a lateral rolling member 210, a lateral mounting seat 220, and a lateral guiding groove 230 disposed on the upper surface of the supporting rail 110, the lateral rolling member 210 is rotatably connected in the lateral mounting seat 220, the lateral rolling member 210 is slidably connected with the lateral guiding groove 230, and the lateral mounting seat 220 is sleeved on the supporting rail 110. The transverse rolling elements 210 may be rollers or rolling bearings.
In this embodiment, the preload measuring mechanism 400 includes a chain block 410, an electronic scale 420, and a load-bearing collar 430, the chain block 410 includes an upper hook 411, a lower hook 412, and a chain 413, the upper hook 411 is connected to the lower end of the transverse mount 220, the lower hook 412 is connected to the upper end of the electronic scale 420, and the lower end of the electronic scale 420 is connected to the load-bearing collar 430.
As shown in fig. 1-8, a method for measuring the preload of the suspension system of the automobile power assembly comprises the following steps based on the device for measuring the preload of the suspension system of the automobile power assembly:
(1) removing an engine cover of the automobile to be preloaded, driving the automobile into the lower part of the supporting cross rod 110, and enabling a front shaft of the automobile to be parallel to a midpoint connecting line of the two supporting vertical rods 120;
(2) screwing the upper locking nut 531 and the lower locking nut 532 respectively, moving the sleeve 522 until the pressure rod 521 tightly presses the vehicle body 600 at the engine compartment, and then screwing the upper locking nut 531 and the lower locking nut 532 respectively to fix the sleeve 522;
(3) marking a point on the upper surface of engine 700, defined as a, a point on the transverse frame of body 600 adjacent engine mounting arm 711, defined as B, a point on the longitudinal frame of body 600 adjacent engine mounting arm 711, defined as C, measuring the distance from point a to point B with a tape measure and recorded as L1, and measuring the distance from point a to point C with a tape measure and recorded as L2;
(4) supporting an oil pan of an engine 700 by using a hydraulic jack, detaching an engine suspension support arm 711, taking the engine suspension support arm 711 of the same model, fixedly connecting one end of the engine suspension support arm 711 with the engine 700, and drawing a straight line, marked as J1, on the upper surface of the engine suspension support arm 711, at the intersection of the plane where the elastic center of a main spring after the main spring is installed is located;
(5) moving the chain block 410 to enable the electronic scale 420 to be positioned right above the straight line J1, sleeving the bearing lantern ring 430 into the engine suspension support arm 711, and enabling the bearing lantern ring 430 to be positioned in the vertical plane of the straight line J1; pulling the chain 413 of the chain block 410 until the engine 700 is not in contact with the hydraulic jack, and removing the hydraulic jack;
(6) adjusting a chain 413 of a chain block 410 to enable a power assembly to be in a horizontal state, measuring the distance from a point A to a point B by using a measuring tape, recording the distance as L ', measuring the distance from the point A to the point C, recording the distance as L ', subtracting L1 in the step (3) to obtain differences a1 and L ', subtracting L in the step (3) to obtain a difference a2, recording the reading of the electronic scale 420 at the moment, wherein the reading is the preload of an engine suspension 711 in the Z direction under the static state of the automobile, if | a1| and | a2| are respectively less than or equal to 5mm, continuing to adjust the posture of the power assembly by adjusting the chain block 410 until | a1| and | a2| are respectively less than or equal to 5mm, and recording the reading of the electronic scale 420 at the moment;
(7) after the preloading measurement of the engine suspension support arm 711 is finished, the preloading of the gearbox suspension 810 is measured, and the engine suspension support arm 711 is reset and installed;
(8) marking a point on the upper surface of the transmission 800, defined as D, a point on the lateral frame of the vehicle body 600 near the transmission mount 810, defined as E, a point on the longitudinal frame of the vehicle body 600 near the transmission mount 810, defined as F, measuring the distance between point D and point E with a tape measure and recording as L3, measuring the distance between point D and point F with a tape measure and recording as L4;
(9) supporting the bottom of the gearbox 800 by using a hydraulic jack, removing a gearbox suspension 810, taking a gearbox suspension support arm 811 with the same model, fixedly connecting one end of the gearbox suspension support arm 811 with the side of the gearbox 800, and drawing a straight line on the upper surface of the gearbox suspension support arm 811, which is marked as J2, at the intersection of the plane where the elastic center of a main spring is located after the main spring is installed;
(10) moving the chain block 410 to enable the electronic scale 420 to be positioned right above the straight line J2, sleeving the bearing lantern ring 430 into the gearbox suspension support arm 811, and enabling the bearing lantern ring 430 to be positioned in the vertical plane of the straight line J2; pulling the chain 413 of the chain block 410 until the gear box 800 is not in contact with the hydraulic jack, and removing the hydraulic jack;
(11) adjusting a chain 413 of a chain block 410 to enable a power assembly to be in a horizontal state, measuring the distance from a point D to a point E by a measuring tape, recording the distance as L3 ', measuring the distance from the point D to the point F, recording the distance as L4', subtracting L3 in the step (8) from L3 'to 8525 in the step (8) to obtain differences a3 and L4', subtracting L4 in the step (8) to obtain a difference a4, recording the reading of an electronic scale 420 at the moment when | a3|, | a4| is respectively smaller than or equal to 5mm, recording the pre-loading of a gearbox suspension 810 in the static state of the automobile in the Z direction, and if | a3| or | a4| is larger than 5mm, continuing to adjust the posture of the power assembly by adjusting the chain block 410 until | a3|, | a4| is respectively smaller than or equal to 5mm, and recording the reading of the electronic scale 420 at the moment.
Example two: as shown in fig. 1-2, a device for measuring preload of a suspension system of an automotive powertrain includes a support frame 100, a lateral moving mechanism 200, a longitudinal moving mechanism 300, a preload measuring mechanism 400, and a vehicle body pressing mechanism 500, where the support frame 100 includes a support cross bar 110 and support vertical bars 120 respectively disposed at two ends of the support cross bar 110, the support cross bar 110 and the support vertical bars 120 form an inverted U-shaped frame, the preload measuring mechanism 400 is slidably disposed on the support cross bar 110 through the lateral moving mechanism 200, the longitudinal moving mechanism 300 is disposed between the support cross bar 110 and the support vertical bars 120, the support vertical bars 120 are fixed on the ground through support portions 130, and the vehicle body pressing mechanism 500 is disposed on the support portions 130.
In this embodiment, the supporting portion 130 is a triangular supporting portion, the triangular supporting portion includes a supporting rod 131 and diagonal rods 132 symmetrically disposed on two sides of the supporting rod 131, top ends of the supporting rod 131 and the diagonal rods 132 are respectively and fixedly connected to a bottom end of the supporting vertical rod 120, bottom ends of the supporting rod 131 and the diagonal rods 132 are respectively provided with corresponding mounting chassis 140, the mounting chassis 140 is fixed on the ground through anchor bolts 141, and a center line of the supporting rod 131 and a center line of the supporting vertical rod 120 are on the same straight line.
In this embodiment, as shown in fig. 4-6, the vehicle body pressing mechanism 500 includes a mounting rod 510, a pressing rod assembly 520, and a locking assembly 530, a bottom of the mounting rod 510 is fixed on the mounting chassis 140 of the supporting rod 131, the pressing rod assembly 520 includes a pressing rod 521 and a sleeve 522, one end of the pressing rod 521 is fixed on the sleeve 522, the sleeve 522 is sleeved on the mounting rod 510, the locking assembly 530 includes an upper locking nut 531 and a lower locking nut 532, an external thread (not shown) is provided on the mounting rod 510, internal threads (not shown) matching with the external thread (not shown) are respectively provided in the upper locking nut 531 and the lower locking nut 532, the sleeve 522 is located between the upper locking nut 531 and the lower locking nut 532, and the sleeve 522 is screwed and fixed on the mounting rod 510 through the upper locking nut 531 and the lower locking nut 532.
In this embodiment, the pressing rod 521 includes a front pressing rod 5211 and a rear pressing rod 5212, the rear end of the front pressing rod 5211 is rotatably connected to the front end of the rear pressing rod 5212 through a rotating shaft 5213, and the rear end of the rear pressing rod 5212 is fixed on the sleeve 522.
In this embodiment, the longitudinal moving mechanism 300 includes a longitudinal guide rail 310, a longitudinal rolling member 320, and a longitudinal rolling member mounting seat 330, a lower bottom surface of the longitudinal guide rail 310 is fixedly connected to a top end of the vertical support rod 120, the longitudinal guide rail 310 is vertically connected to the vertical support rod 120, an outer side wall of the longitudinal rolling member mounting seat 330 is fixedly connected to an end of the horizontal support rod 110, a concave groove 331 is formed at a lower end of the longitudinal rolling member mounting seat 330, the longitudinal rolling member 320 is rotatably connected to the groove 331, and the longitudinal rolling member 320 is slidably connected to the longitudinal guide rail 310. The longitudinal rolling elements 320 may be rollers or rolling bearings.
In this embodiment, the two ends of the longitudinal rail 310 are respectively provided with a limiting shaft 340, and the length of the limiting shaft 340 is greater than the width of the longitudinal roller mounting seat 330.
In this embodiment, as shown in fig. 3, the lateral moving mechanism 200 includes a lateral rolling member 210, a lateral mounting seat 220, and a lateral guiding groove 230 disposed on the upper surface of the supporting rail 110, the lateral rolling member 210 is rotatably connected in the lateral mounting seat 220, the lateral rolling member 210 is slidably connected with the lateral guiding groove 230, and the lateral mounting seat 220 is sleeved on the supporting rail 110. The transverse rolling elements 210 may be rollers or rolling bearings.
In this embodiment, the preload measuring mechanism 400 includes a chain block 410, an electronic scale 420, and a load-bearing collar 430, the chain block 410 includes an upper hook 411, a lower hook 412, and a chain 413, the upper hook 411 is connected to the lower end of the transverse mount 220, the lower hook 412 is connected to the upper end of the electronic scale 420, and the lower end of the electronic scale 420 is connected to the load-bearing collar 430.
As shown in fig. 1-6, 9 and 10, a method for measuring the preload of the suspension system of the automobile power assembly comprises the following steps based on the device for measuring the preload of the suspension system of the automobile power assembly:
(1) removing the engine 700 cover of the automobile to be preloaded, driving the automobile into the lower part of the support cross rod 110, and enabling the front shaft of the automobile to be parallel to the midpoint connecting line of the two support vertical rods 120;
(2) the upper and lower lock nuts 531 and 532 are respectively screwed off, the sleeve 522 is moved to the front pressure lever 5211 to press the vehicle body 600 at the gearbox 800, and then the upper and lower lock nuts 531 and 532 are respectively screwed to fix the sleeve 522;
(3) marking a point on the upper surface of the gearbox 800, defined as a, a point on the transverse frame of the vehicle body 600 near the gearbox suspension 810, defined as B, a point on the longitudinal frame of the vehicle body 600 near the gearbox 800, defined as C, measuring the distance between point a and point B with a tape measure and recording as L1, measuring the distance between point a and point C with a tape measure and recording as L2;
(4) supporting the bottom of the gearbox 800 by using a hydraulic jack, removing a gearbox suspension 810, taking a gearbox suspension support arm 811 with the same model, fixedly connecting one end of the gearbox suspension support arm 811 with the side of the gearbox 800, and drawing a straight line on the upper surface of the gearbox suspension support arm 811, which is marked as J1, at the intersection of the plane where the elastic center of a main spring is located after the main spring is installed;
(5) moving the chain block 410 to enable the electronic scale 420 to be positioned right above the straight line J1, sleeving the bearing lantern ring 430 into the gearbox suspension support arm 811, and enabling the bearing lantern ring 430 to be positioned in the vertical plane of the straight line J1; pulling the chain 413 of the chain block 410 until the gear box 800 is not in contact with the hydraulic jack, and removing the hydraulic jack;
(6) adjusting a chain 413 of a chain block 410 to enable a power assembly to be in a horizontal state, measuring the distance from a point A to a point B by using a measuring tape, recording the distance as L1 ', measuring the distance from the point A to the point C, recording the distance as L2', subtracting L1 in the step (3) from L1 'to obtain differences a1 and L2', subtracting L2 in the step (3) to obtain a difference a2, recording the reading of an electronic scale 420 at the moment when | a1| and | a2| are respectively smaller than or equal to 5mm, wherein the reading is the preload of a gearbox suspension 810 under the static state of the automobile in the Z direction, and if | a1| or | a2| is larger than 5mm, continuing to adjust the chain block 410 to adjust the attitude of the power assembly until | a1| and | a2| are respectively smaller than or equal to 5mm, and recording the reading of the electronic scale 420 at the moment;
(7) after the preloading measurement of the gearbox suspension 810 is finished, the preloading of the engine suspension support arm 711 is measured, and the gearbox suspension 810 is reset and installed;
(8) marking a point on the upper surface of the engine 700, defined as D, a point on the transverse frame of the vehicle body 600 near the engine mount arm 711, defined as E, a point on the longitudinal frame of the vehicle body 600 near the transmitter mount, defined as F, measuring the distance between point D and point E with a tape measure and recording as L3, and measuring the distance between point D and point F with a tape measure and recording as L4;
(9) supporting an oil pan of an engine 700 by using a hydraulic jack, detaching an engine suspension support arm 711, taking the engine suspension support arm 711 of the same model, fixedly connecting one end of the engine suspension support arm 711 with the engine 700, and drawing a straight line, marked as J2, on the upper surface of the engine suspension support arm 711, at the intersection of the plane where the elastic center of a main spring after the main spring is installed is located;
(10) moving the chain block 410 to enable the electronic scale 420 to be positioned right above the straight line J2, sleeving the bearing lantern ring 430 into the engine suspension support arm 711, and enabling the bearing lantern ring 430 to be positioned in the vertical plane of the straight line J2; pulling the chain 413 of the chain block 410 until the engine 700 is not in contact with the hydraulic jack, and removing the hydraulic jack;
(11) adjusting a chain 413 of a chain block 410 to enable a power assembly to be in a horizontal state, measuring the distance from a point D to a point E by a measuring tape, recording the distance as L ', measuring the distance from the point D to the point F, recording the distance as L ', subtracting L in the step (8) to obtain differences a3 and L ', subtracting L in the step (8) to obtain a difference a4, if | a3|, | a4| is less than or equal to 5mm respectively, recording the reading of the electronic scale 420 at the moment, wherein the reading is the preload of an engine suspension 711 in the Z direction under the static state of the automobile, and if | a3| or | a4| is greater than 5mm, continuing to adjust the chain block 410 to adjust the attitude of the power assembly until | a3|, | a4| are less than or equal to 5mm respectively, and recording the reading of the electronic scale 420 at the moment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a measure preloaded device of automobile power assembly suspension system, its characterized in that includes support frame, lateral shifting mechanism, longitudinal movement mechanism, preload measuring mechanism and automobile body hold-down mechanism, the support frame including support the horizontal pole and set up respectively the support montant at support horizontal pole both ends, the support horizontal pole with the support montant enclose into the U type frame of an inversion, preload measuring mechanism pass through lateral shifting mechanism slide and set up the support horizontal pole on, the support horizontal pole with the support montant between be provided with longitudinal movement mechanism, the support montant pass through the supporting part and fix subaerial, the supporting part on be provided with automobile body hold-down mechanism.
2. The device of claim 1, wherein the support portion is a triangular support portion, the triangular support portion comprises a support rod and diagonal rods symmetrically arranged on two sides of the support rod, the top ends of the support rod and the diagonal rods are respectively fixedly connected with the bottom ends of the vertical support rods, the bottom ends of the support rod and the diagonal rods are respectively provided with corresponding installation chassis, the installation chassis are fixed on the ground through anchor bolts, and the center line of the support rod and the center line of the vertical support rod are on the same straight line.
3. The device for measuring the preload of the automotive powertrain suspension system of claim 2, it is characterized in that the vehicle body pressing mechanism comprises an installation rod, a pressure rod component and a locking component, the bottom of the installation rod is fixed on an installation chassis of the support rod, the pressure lever component comprises a pressure lever and a sleeve, one end of the pressure lever is fixed on the sleeve, the sleeve is sleeved on the mounting rod, the locking component comprises an upper locking nut and a lower locking nut, the mounting rod is provided with an external thread, the upper locking nut and the lower locking nut are respectively provided with an internal thread matched with the external thread, the sleeve is positioned between the upper locking nut and the lower locking nut, and the sleeve is screwed and fixed on the mounting rod through the upper locking nut and the lower locking nut.
4. The device for measuring the preload of the automotive powertrain suspension system according to claim 3, wherein said compression bar comprises a front compression bar and a rear compression bar, the rear end of said front compression bar is rotatably connected to the front end of said rear compression bar through a rotating shaft, and the rear end of said rear compression bar is fixed to said sleeve.
5. The device for measuring the preload of the suspension system of the automobile power assembly according to claim 3, wherein the longitudinal moving mechanism comprises a longitudinal guide rail, a longitudinal rolling member and a longitudinal rolling member mounting seat, the lower bottom surface of the longitudinal guide rail is fixedly connected with the top end of the vertical supporting rod, the longitudinal guide rail is vertically connected with the vertical supporting rod, the outer side wall of the longitudinal rolling member mounting seat is fixedly connected with the end of the horizontal supporting rod, the lower end of the longitudinal rolling member mounting seat is provided with an inward concave groove, the longitudinal rolling member is rotatably connected in the groove, and the longitudinal rolling member is slidably connected with the longitudinal guide rail.
6. The device for measuring the preload of the automotive power assembly suspension system as claimed in claim 5, wherein the two ends of the longitudinal guide rail are respectively provided with a limiting shaft, and the length of the limiting shaft is greater than the width of the longitudinal rolling member mounting seat.
7. The apparatus of claim 6, wherein said lateral movement mechanism comprises lateral rollers rotatably coupled within said lateral mounts, lateral mounts slidably coupled to said lateral guide slots, and lateral guide slots disposed on an upper surface of said support rail, said lateral mounts being nested on said support rail.
8. The device of claim 7, wherein the preload measuring mechanism comprises a chain block, an electronic scale and a bearing collar, the chain block comprises an upper hook, a lower hook and a chain, the upper hook is connected with the lower end of the transverse mounting base, the lower hook is connected with the upper end of the electronic scale, and the lower end of the electronic scale is connected with the bearing collar.
9. A method for measuring the preload of an automotive powertrain suspension system, based on the apparatus for measuring the preload of the automotive powertrain suspension system of claim 8, comprising the steps of:
(1) removing an engine cover of the automobile to be preloaded, driving the automobile into the lower part of the supporting cross rod, and enabling a front shaft of the automobile to be parallel to the connecting line of the middle points of the two supporting vertical rods;
(2) respectively unscrewing an upper locking nut and a lower locking nut, moving the sleeve until the pressure rod presses the vehicle body at the first suspension to be measured and the second suspension to be measured, and then respectively screwing the upper locking nut and the lower locking nut to fix the sleeve;
(3) marking a point, defined as a, on the upper surface of the powertrain near the first suspension to be measured, a point, defined as B, on the transverse frame of the vehicle body near the first suspension to be measured, a point, defined as C, on the longitudinal frame of the vehicle body near the first suspension to be measured, measuring the distance from point a to point B with a tape measure and recording as L1, measuring the distance from point a to point C with a tape measure and recording as L2;
(4) supporting the bottom of the power assembly by using a hydraulic jack, removing a first suspension to be measured, taking a first suspension support arm to be measured of the same model, fixedly connecting one end of the first suspension support arm to be measured with the corresponding power assembly side, and drawing a straight line, marked as J1, on the upper surface of the first suspension support arm to be measured, at the intersection of the straight line and the plane where the elastic center of the main spring is located after the main spring is installed;
(5) moving the chain block to enable the electronic scale to be positioned right above the straight line J1, sleeving the bearing lantern ring into the first suspension support arm to be measured, and enabling the bearing lantern ring to be positioned in the vertical plane where the straight line J1 is positioned; pulling the chain of the chain block until the power assembly is not in contact with the hydraulic jack, and removing the hydraulic jack;
(6) adjusting a chain of a chain block to enable a power assembly to be in a horizontal state, measuring the distance from a point A to a point B by using a measuring tape, recording the distance as L1 ', measuring the distance from the point A to the point C as L2', L1 'subtracting L1 in the step (3) to obtain differences a1 and L2', subtracting L2 in the step (3) to obtain a difference a2, if | a1| and | a2| are respectively less than or equal to 5mm, recording the reading of the electronic scale at the moment, wherein the reading is the preload applied to a first to-be-measured suspension in the Z direction of the automobile in a static state, and if | a1| or | a2| is greater than 5mm, continuing to adjust the chain block to adjust the posture of the power assembly until | a1| and | a2| are respectively less than or equal to 5mm, and recording the reading at the moment;
(7) after the preload measurement of the first suspension to be measured is finished, measuring the preload of the second suspension to be measured, and resetting and installing the first suspension to be measured;
(8) marking a point on the upper surface of the powertrain proximate the second suspension to be measured, defined as D, a point on the vehicle body proximate the transverse frame of the second suspension to be measured, defined as E, a point on the vehicle body proximate the longitudinal frame of the second suspension to be measured, defined as F, measuring the distance from point D to point E with a tape measure and recorded as L3, measuring the distance from point D to point F with a tape measure and recorded as L4;
(9) removing the second suspension to be measured, taking a second suspension support arm to be measured with the same model, fixedly connecting one end of the second suspension support arm to be measured with the corresponding power assembly side, and drawing a straight line, marked as J2, on the upper surface of the second suspension support arm to be measured, at the intersection of the straight line and the plane where the elastic center of the main spring is located after the main spring is installed;
(10) moving the chain block to enable the electronic scale to be positioned right above the straight line J2, sleeving the bearing lantern ring into the second suspension arm to be measured, and enabling the bearing lantern ring to be positioned in the vertical plane where the straight line J2 is positioned; pulling the chain of the chain block until the power assembly is not in contact with the hydraulic jack, and removing the hydraulic jack;
(11) adjusting a chain of a chain block to enable a power assembly to be in a horizontal state, measuring the distance from a point D to a point E by a measuring tape, recording the distance as L ', measuring the distance from the point D to the point F, recording the distance as L ', subtracting L in the step (8) to obtain differences a3 and L ', subtracting L in the step (8) to obtain a difference a4, if | a3|, | a4| is respectively less than or equal to 5mm, recording the reading of the electronic scale at the moment, wherein the reading is the preload applied to the second to-be-measured suspension in the Z direction under the static state of the automobile, and if | a3| or | a 367 | is greater than 5mm, continuing to adjust the chain block to adjust the attitude of the power assembly until | a3|, | a4| is respectively less than or equal to 5mm, and recording the reading of the electronic scale at the moment.
10. The method for measuring the preload of the powertrain suspension system of the vehicle as claimed in claim 9, wherein the first suspension to be measured is an engine suspension or a transmission suspension, and the second suspension to be measured is an engine suspension or a transmission suspension.
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| CN110702290B (en) * | 2019-11-12 | 2021-08-24 | 中国第一汽车股份有限公司 | Method and device for measuring bearing reaction force of finished automobile power assembly suspension under static state |
| CN113310709A (en) * | 2021-05-27 | 2021-08-27 | 一汽解放汽车有限公司 | Commercial car power assembly suspension multidirectional loading test device |
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| US7628077B2 (en) * | 2007-06-27 | 2009-12-08 | Honda Motor Co., Ltd. | Excitation test method and apparatus for vehicle |
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| CN202661265U (en) * | 2012-03-28 | 2013-01-09 | 柳州日高橡胶制品有限责任公司 | Two-axis-linkage suspension test fixture |
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